In ALL activation of the ITIM-receptor platelet endothelial cell adhesion molecule 1 (PECAM-1), CD300A, and LAIR1 has been shown to compensate for excessive signaling in B cells that is mediated through recruitment of the inhibitory phosphatases PTPN6 and INPP5D [33]. The gene discussed is PECAM1; the disease is acute lymphoblastic leukemia.